the weld metals differ slightly from the parent steel composition as follows: Niobium Work on both P91 and P92 consumables has shown that reducing the niobium towards the lower end of the parent alloy specification range has a beneficial effect on toughness.3%.

12CrMoV alloy special steel Specs:
12CrMoV alloy special steel Specs also can be called as alloy structural steel. Alloy steel means this kind of grade contains some special alloy composition. Alloy steel plate application is very wide, as : Machine, pressure vessel, construction and so on .